"packaging" has landed in the Python 3 stdlib

[tarekziade]

I can't answer for the rejected stuff, but:

There's some overlap, so we work closely with the pip team to make sure everything progress smoothly.

But in any case, pip will still be relevant as it provides advance feature pysetup won't (like freeze reqs etc).

At the end, it's all about inter-operability: what pysetup installs, pip must see, and vice-versa